package com.wyj.netty;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

public class NettyClient {
    public static void main(String[] args) throws InterruptedException {
        //    1、创建客户端线程组
        NioEventLoopGroup nioEventLoopGroup = new NioEventLoopGroup();
        //    2、创建客户端启动助手
        Bootstrap bootstrap = new Bootstrap();
        //    3、设置线程组
        bootstrap.group(nioEventLoopGroup)
                //    4、设置客户端通道实现为nio
                .channel(NioSocketChannel.class)
                //    5、创建一个通道初始化对象
                .handler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel socketChannel) throws Exception {
                        //    6、向pipeline中注册业务处理handler
                        // socketChannel.pipeline().addLast(new MessageDecoder());
                        // socketChannel.pipeline().addLast(new MessageEncoder());
                        socketChannel.pipeline().addLast(new MessageCoder());
                        socketChannel.pipeline().addLast(new NettyClientHandler());

                    }
                });
        //    7、启动客户端并连接服务端，同时将异步改为同步
        ChannelFuture channelFuture = bootstrap.connect("127.0.0.1", 19999).sync();
        //    8、关闭通道和关闭连接池
        channelFuture.channel().closeFuture().sync();
        nioEventLoopGroup.shutdownGracefully();
    }
}
